Op Art was a branch of geometric, abstract art of the 1960s that drew from geometry, optics and physiology. Alongside painting, this movement also found expression in Czech photography. Its foremost exponent was Zdeněk Virt (1925 Prague—2008 Prague). Virt took up photography in the mid—1950s, but won recognition only in the following decade for his images of nudes, manipulating them further through grids and networks. The resulting compositions combined the exactness of science with erotic tension, in which the artist also exploited his earlier training in the graphic arts. In 1967—1990, Virt was a part-time teacher at the Prague Film Academy.